CN102695591A - Preform for producing plastic containers in a two-stage stretch blow-moulding process - Google Patents

Preform for producing plastic containers in a two-stage stretch blow-moulding process Download PDF

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Publication number
CN102695591A
CN102695591A CN2010800582182A CN201080058218A CN102695591A CN 102695591 A CN102695591 A CN 102695591A CN 2010800582182 A CN2010800582182 A CN 2010800582182A CN 201080058218 A CN201080058218 A CN 201080058218A CN 102695591 A CN102695591 A CN 102695591A
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CN
China
Prior art keywords
prefabricated component
base portion
wall
zone
stretch blow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2010800582182A
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Chinese (zh)
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CN102695591B (en
Inventor
罗伯特·西格尔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alwenlena & Co KG Alpra Works GmbH
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Alwenlena & Co KG Alpra Works GmbH
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Publication of CN102695591A publication Critical patent/CN102695591A/en
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Publication of CN102695591B publication Critical patent/CN102695591B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/14—Making preforms characterised by structure or composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/6409—Thermal conditioning of preforms
    • B29C49/6418—Heating of preforms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/06—Making preforms by moulding the material
    • B29B11/08—Injection moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/06—Making preforms by moulding the material
    • B29B11/10—Extrusion moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B11/00—Making preforms
    • B29B11/06—Making preforms by moulding the material
    • B29B11/12—Compression moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/072—Preforms or parisons characterised by their configuration having variable wall thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/073—Preforms or parisons characterised by their configuration having variable diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
    • B29C2949/0772—Closure retaining means
    • B29C2949/0773—Threads
    • B29C2949/0774—Interrupted threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
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    • B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
    • B29C2949/0777—Tamper-evident band retaining ring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/078—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/081—Specified dimensions, e.g. values or ranges
    • B29C2949/0811—Wall thickness
    • B29C2949/0813—Wall thickness of the neck
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/081—Specified dimensions, e.g. values or ranges
    • B29C2949/0811—Wall thickness
    • B29C2949/0818—Wall thickness of the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/22—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at neck portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/24—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at flange portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/26—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at body portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/28—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at bottom portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3008—Preforms or parisons made of several components at neck portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3012—Preforms or parisons made of several components at flange portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
    • B29K2105/0044—Stabilisers, e.g. against oxydation, light or heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/0005—Condition, form or state of moulded material or of the material to be shaped containing compounding ingredients
    • B29K2105/0047—Agents changing thermal characteristics
    • B29K2105/005—Heat sensitisers or absorbers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • B29K2105/253—Preform
    • B29K2105/258—Tubular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0065—Permeability to gases
    • B29K2995/0067—Permeability to gases non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7158—Bottles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Thermal Sciences (AREA)
  • Geometry (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

The invention relates to a preform for producing plastic containers in a two-stage stretch blow-moulding process, wherein the preform has an elongated preform body (2), the one longitudinal end of which is closed by a bottom (3), while the other longitudinal end adjoins a neck section (4) having threaded sections (5) or similar positive protrusions. The preform (1) is produced from a plastic material suited for the stretch blow-moulding process, said material having a refractive index of 1.3 to 1.6 at a temperature of 100 DEG C to 120 DEG C. The preform bottom (3) is designed such that the outer wall (18) thereof and the inner wall (17) thereof delimit a flat divergent lens. The outer wall (18) and the inner wall (17) of the preform bottom (3) designed as a divergent lens have radii of curvature (c, b) which are greater at least by a factor of 1.4 than the radii of curvature (s, r) of the associated outer wall (8) or inner wall (7) in the region of the preform body.

Description

Be used for producing the prefabricated component of plastic containers at two stage stretch blow molding shaping methods
The present invention relates to the prefabricated component that is used for producing plastic containers at two stage stretch blow molding shaping methods according to the aforementioned part of claim 1.
The bulk plastic containers that uses at present (particularly for example plastic flask etc.) utilizes stretch blow molding shaping method production.In this method; So-called prefabricated component in most of the cases have the elongated tubular product such shape and have one of which vertically end base portion and its another vertically end be formed with the neck region of threaded portion etc., this prefabricated component is inserted in the die cavity of blow molding and the medium that injects through superpressure carries out blowing.In this case, utilize the elongate mandrel of inserting through neck opening to make prefabricated component in the axial direction by additional elongation.After elongation/blow-moulding process, with the demoulding from blow mold of finished product plastic containers.
Usually before stretch blow-molded process, utilize independent injection molding process to produce the prefabricated component of single or multiple lift.Also proposed to utilize extruded in plastic (plastic extrusion press) method to produce prefabricated component.The raw material of in stretch blow-molded technology, producing plastic containers mainly uses polypropylene or PET (PETG).Polypropylene and PET tested repeatedly and their character fully known.In the stretch blow-molded technology of so-called single-stage, prefabricated component direct inflation after manufacturing also extends to form plastic containers.Yet in many cases, plastic containers are to utilize production site and asynchronism(-nization) to store in the dual stage process production of stretch blow-molded process and in the interstage to be provided with the back use.In stretch blow-molded process subsequently, prefabricated component is incorporated in the blow mold by heating once more, utilizes elongated axle to stretch in a longitudinal direction, and passes through the superpressure inflation to form plastic containers according to die cavity.Like this, this two process-injection mo(u)ldings and stretch blow-molded-can operate separately and be optimized.
The prefabricated component that is used for stretch blow molding shaping method has elongated shape usually and has bandy protrusion base portion.The moulding and have the threaded portion or similar forward projection fully of the neck region of prefabricated component, this makes it can adhere to closure or covering, and said closure or covering are equipped with the locking element of corresponding design.In this two phase process, prefabricated component must be heated to the deformation temperature scope once more before stretch blow-molded.For this reason, in the neck region of prefabricated component, insert finger-like clamping device and prefabricated component carried pass through heating station.In many cases, the heating of prefabricated component is to carry out through the infra-red radiation or the near-infrared radiation that are produced by quartz-tube radiator.For utilizing the energy of quartz-tube radiator emission better, provide more than one speculum to come reflecting electromagnetic radiation.In heating station, prefabricated component be transferred quartz-tube radiator and and its mirror of facing between.Through the bullet shape base portion of prefabricated component, the infra-red radiation of irradiation through scattering or even directly move to the finger-like clamping device of prefabricated component, this device is heated thus.For the neck region of the prefabricated component that prevents the high accuracy moulding deforms, the finger-like clamping device must cool off.Because the emittance that absorbs often can not be disposed to enough degree through the clamping device cooling, so the prefabricated component neck often must be designed to have than to treat the bigger wall thickness of being made by prefabricated component of the necessary wall thickness of plastic containers.During stretch blow-molded, prefabricated component utilizes the elongate mandrel longitudinal stretching.In the support surface area of the prefabricated component base portion with elongate mandrel, the cooling of base portion is quick relatively, and can produce the non-crystalline material accumulation of not expecting in the base regions of the plastic containers of in stretch blow-molded process, producing.
Thus, an object of the present invention is to remedy these shortcomings of the prefabricated component of prior art.The neck region that provides a kind of prefabricated component that it can design wall thickness be reduced.Be used to form in the further processing procedure of the prefabricated component of plastic containers in stretch blow-molded technology of two stages, with avoiding in the base regions of container, producing the non-crystalline material accumulation of not expecting.
These with in addition further purpose be achieved through prefabricated component according to the present invention with technical characterictic of listing in the claim 1.Of the present invention further develop and favourable and preferred variation embodiment is the theme of dependent claims.
The present invention proposes a kind of prefabricated component that is used at stretch blow-molded technology production of two stages plastic containers; And said prefabricated component has elongated prefabricated component body; One of which vertical end is by the base portion sealing, and its another vertical end is connected to the neck region with threaded portion or similar forward projection.Said prefabricated component is processed by the plastics that are applicable to stretch blow-molded process, and its refractive index under 10 ℃ to 120 ℃ temperature is 1.3 to 1.6.The prefabricated component base designs is for making its outer wall and its inwall limit smooth divergent lens.The radius of curvature of outer wall and inwall that is designed to the prefabricated component base portion of divergent lens in this case is at least 1.4 times of radius of curvature of outer wall relevant in the prefabricated component body region and inwall.
In conjunction with the refractive index of preform material, configuration prefabricated component base portion makes the electromagnetic heat radiation of irradiation depart from the finger-like clamping device as smooth divergent lens.Through prefabricated component body configuration according to the present invention, in prefabricated component base portion and prefabricated component wall, bear the introducing electromagnetic heat radiation that absorbs larger proportion.Therefore, carry through during the heating station at prefabricated component, less emittance arrives the finger-like clamping device of prefabricated component, and being heated of this clamping device significantly reduced.Therefore the neck of the prefabricated component of mediate contact finger-like clamping device also is heated less.Therefore, the risk of neck deformation significantly reduces, and neck can be designed as and has small wall thickness.The minimizing that reduces to cause expensive raw materials at the preform neck wall thickness.Particularly when the goods of large-scale production such as plastic containers, the material minimizing has economy or ecological benefit.
In general, design according to the present invention obtains smooth prefabricated component base portion.Therefore, in drawing process, at first only exist the zonule to be formed on front end and have the elongate mandrel of small curvature radius and have the contact between the prefabricated component base portion of big relatively radius of curvature.Only under very high elongation speed and pressure and towards the end of mechanical elongation process, this contact area just increases.Therefore, the cooling of the part of prefabricated component base portion is limited in very little zone, therefore can avoid the non-crystalline material accumulation of in the base regions of the plastic containers of being produced, not expecting.On the contrary, the not yet cooling plastic material in the prefabricated component base portion can be used for the remainder of blow-moulding process.This also can reduce the material in the prefabricated component base portion.
In a variant of the present invention, be designed in the axle zone of prefabricated component or the little 0.2mm at least of wall thickness of the prefabricated component base portion at transitional region place in the wall ratio prefabricated component body of the prefabricated component base portion of the smooth divergent lens of the central area of divergent lens.
The prefabricated component base portion is configured to particularly to make and is basically perpendicular to electromagnetic radiation that the prefabricated component axle is incorporated into 0.5 μ m～2 mum wavelengths in the base regions through being absorbed to a great extent in the base portion of prefabricated component and/or the total reflection in the base substrate.Therefore guarantee that considerably less electromagnetic radiation arrives the finger-like clamping device, and the neck that contacts with clamping device does not receive serious heating.Through in prefabricated component base portion and/or prefabricated component body, absorbing the heat radiation of being introduced of larger proportion, also increase the efficiency of heating surface of prefabricated component.
The prefabricated component base portion can be designed as plano-concave or concavo-convex.In this case, term " is put down " or " protruding " relates to the first surface that electromagnetic radiation takes place, i.e. the outer wall of prefabricated component base portion.Term " recessed " relates to the opposite inwall of prefabricated component base portion.The radius of curvature of the outer wall of prefabricated component base portion is greater than the radius of curvature of the prefabricated component inwall in its base regions.Under the situation of smooth outer wall design, radius of curvature is infinitely great.
Design and the further processed prefabricated member that is provided in stretch blow-molded process of two stages advantageously are made up of the plastics that are selected from polyester, PET (PETG), polyolefin, polystyrene and PLA (PLA) or plastic hybrid according to the present invention.
Can comprise more than one layer according to the application that is provided according to prefabricated component of the present invention.It can also comprise barrier additive, particularly oxygen trap, nanoclay or ultraviolet interleaving agent.Change in the embodiment at of the present invention another, comprise that a plurality of layers prefabricated component also can have in order to barrier layer and/or sliding coating and/or the residual coating (residual discard coating) that abandons to antioxygen and/or ultraviolet radiation.
For example utilize injection moulding process production according to prefabricated component of the present invention.Injection moulding process or injection moulding method are by abundant test and the prefabricated component that obtains having required precision.What in this case, the feed points of prefabricated component was suitable is to be arranged in base regions.In the plastic containers by preform production, it is normally sightless in expanded position usually.
The extruded in plastic method is the alternative production methods of prefabricated component, and it also causes high-quality result and is fit to very much large-scale production.
The prefabricated component of design can also utilize the extrusion and blow molding method to produce according to the present invention.The production method that this recent usage degree increases is characterised in that its high productive capacity and low production cost, and also is particularly suitable for comprising a plurality of layers prefabricated component.Method production that the multilayer prefabricated component also can utilize so-called " post forming (overmolding) ".
The prefabricated component of design can provide the color that departs from conventional prefabricated component body or can have at least one nonferrous layer in the variation embodiment in multilayer at correct position at least according to the present invention.Various colors or color layers also can be used for for example absorbing-even better, particularly in preform material-emittance when prefabricated component is heated, introduced.
Change in embodiment at another of prefabricated component, it also can provide the outer wall in the base regions of prefabricated component to have the roughness bigger than the outer wall of prefabricated component body.The roughness that increases also is used in the preform material absorbed radiation energy better.
Variation embodiment with respect to reducing a favourable prefabricated component of materials used has neck, said neck-in the threaded portion or similarly in the zone of forward projection-the have minimum wall thickness (MINI W.) than the average wall thickness little at least 20% of prefabricated component body region.
Change in embodiment at of the present invention another, in the threaded portion or similarly in the zone of forward projection particularly on the threaded base portion, neck has the minimum wall thickness (MINI W.) less than 1.34mm.
Utilize stretch blow-molded process of two stages to have in many cases than the better more uniform distribution of material of the conventional plastic containers of prior art by the plastic containers of the prefabricated component manufacturing of design according to the present invention; Thereby has strength character more uniformly with respect to mechanical stress and thermal stress, for example in the application of hot dispense contents therein.
Other advantages of the present invention with change the description of embodiment and draw from following embodiment with reference to accompanying drawing.At this, non-drafting in proportion:
Fig. 1 illustrates the half side-view of prefabricated component according to the present invention in the axle district in the heating station; With
Fig. 2 illustrates the half side-view of prefabricated component according to the present invention in the axle district.
Fig. 1 schematically shows the half side-view of the axial incision of prefabricated component, and it provides Reference numeral 1 on the whole in being transferred through the process of heating station 30.Prefabricated component 1 has elongated prefabricated component body 2, and one of which vertical end is by 3 sealings of prefabricated component base portion.The neck 4 that is shaped on threaded portion 5 grades on its outside is connected to the opposite ends of prefabricated component body 2.Threaded portion 5 grades allow to be equipped with the closure of corresponding locking element or covering screw thread to engage.Prefabricated component 1 for example utilizes injection moulding or extrusion production.It also can utilize the extrusion and blow molding method to produce.Prefabricated component 1 is the intermediate products of stretch blow-molded process of two stages, wherein at first produces prefabricated component 1, then in different time and place, with prefabricated component through axial tension and again moulding with inflation radially with the formation plastic containers.The advantage of stretch blow-molded process of two stages is that the production of prefabricated component and the production of plastic containers can carry out and have in each case optimal clock speed independently of each other.
In order prefabricated component 1 can be stretched in stretch blow-moulding forming device and to carry out inflation through superpressure, it at first must be heated to the necessary temperature of stretch blow-molded process once more.For this reason, it is transferred through one or more heating station 30.Heating station 30 comprises a plurality of heating lamps, and normally quartz-tube radiator 31, the electromagnetic radiation R of its emission near-infrared and infra-red range.The wave-length coverage of emitted radiation is 0.5 μ m～2 μ m.Usually, several quartz-tube radiators 31 are arranged as one above another.Provide in the face of the reflector arrangement 32 of quartz-tube radiator 31 metallic mirror for example, its reflection is by the electromagnetic radiation of quartz-tube radiator emission.Prefabricated component 1 is transferred through the passage between quartz-tube radiator 31 and reflector arrangement 32.For this reason, it is headfirst filled in neck 4 on finger-like clamping device 35, is passed through heating station 30 continuously or periodically.Usually, in this case, finger-like clamping device 35 also still around its axle rotation, makes from all side heat prefabricated components 1.Finger-like clamping device 35 is being fixed or is movably being moved below the dividing plate 33, and it is provided with the slit-shaped openings 34 that is used for prefabricated component 1.Dividing plate 33 is used to prevent the neck 4 that thermal electromagnetic radiation R moves to finger-like clamping device 35 and prefabricated component 1 that adds from quartz-tube radiator 31 or reflector apparatus 32.In most of the cases, finger-like clamping device 35 is also extra to be provided and for example cools off water-cooled but, to prevent that it is by superheated.Because this heating, the high accuracy manufacturing also can be softened or be out of shape with the neck 4 of the prefabricated component 1 of finger-like clamping device 35 mediate contacts.
Because dividing plate 33, so relatively little electromagnetic radiation arrives finger-like clamping device 35.But, highly play shape prefabricated component base portion and represent a problem in the prefabricated component of prior art.This causes introducing electromagnetism in the base regions and adds heat radiation and move to finger-like clamping device 35 and heat the latter through diffraction and multipath reflection.In order to address this problem, prefabricated component 1 according to the present invention is processed by the plastics that are applicable to stretch blow molding shaping method and have under 10 ℃ to the 120 ℃ temperature refractive index of 1.3 to 1.6.Prefabricated component base portion 3 has the inwall 17 and outer wall 18 that limits smooth divergent lens.For this reason, radius of curvature b, the c of the inwall 17 of prefabricated component base portion 3 and outer wall 18 are radius of curvature r, s at least 1.4 times of inwall 7 and the outer wall 8 of prefabricated component body 2.In the zone of the axle A of prefabricated component 1, form the center of divergent lens simultaneously, the wall thickness in the transition region of the wall ratio prefabricated component body 2 of prefabricated component base portion 3 is 0.2mm at least less.Especially, prefabricated component base portion 3 is designed to make that be basically perpendicular to wavelength that prefabricated component axle A introduces is that the electromagnetic radiation of 0.5 μ m～2 μ m is through be absorbed in the prefabricated component base portion 3 of prefabricated component 1 and/or the total reflection in the prefabricated component body 2 to a great extent.
Fig. 2 illustrates the half side-view figure according to the axial incision of prefabricated component of the present invention that is labeled as Reference numeral 1 equally on the whole.Being generally columniform elongated prefabricated component body tag is Reference numeral 2, and the prefabricated component foot marker is 3.Be labeled as Reference numeral 4 with prefabricated component body 2 adjacent necks, and the threaded portion is labeled as Reference numeral 5.The axle of prefabricated component provides Reference numeral A, and transfer ring 6 separates neck 4 with prefabricated component body 2.Transfer ring 6 is used for carrying and support prefabricated component and by the plastic containers of its production at some cellular zone of stretch blow-moulding forming device.In the zone of prefabricated component body 2, prefabricated component 1 has inwall 7 and outer wall 8.Inwall 7 in the zone of prefabricated component body 2 has radius of curvature r.The outer wall 8 of prefabricated component body 2 has the radius of curvature that is labeled as Reference numeral s.In the zone of prefabricated component base portion 3, inwall has Reference numeral 17, and outer wall has Reference numeral 18.Inwall 17 in the zone of prefabricated component base portion 3 has the radius of curvature that is labeled as b, and the outer wall 18 in the zone of prefabricated component base portion 3 has the radius of curvature that is labeled as c.
Prefabricated component base portion 3 designs according to plano-concave or concavo-convex divergent lens type.Term " is put down " or " protruding " is meant the electromagnetic radiation bombardment first surface on it of irradiation in this case, promptly on the outer wall 18 of prefabricated component base portion 3.Term " recessed " relates to the opposite inwall 17 of prefabricated component base portion 3.The outer wall 18 of prefabricated component base portion 3 has the radius of curvature c greater than the inwall 17 of prefabricated component body 2.Outer wall 18 at prefabricated component base portion 3 is under the situation of flat design, and radius of curvature c is infinitely great.
Because according to the design of prefabricated component base portion 3 of the present invention, the total reflection of prefabricated component base portion 3 and/or the prefabricated component body 2 of the electromagnetic radiation that is radiated at most wavelength in the zone of prefabricated component base portion 3 and is 0.5 μ m～2 μ m through prefabricated component 1 or from the inwall of prefabricated component 1 outwards again secondary reflection be absorbed.Total reflection is to take place along with the transition from the optically denser medium to the optically thinner medium.Be transferred to electromagnetic radiation the breaking away from according to the Snellius law of refraction at the interface of optically thinner medium (having medium) than low-refraction n2 at the incident axle from optically denser medium (medium) with high index n1.The refraction angle of electromagnetic radiation (for example, infra-red radiation) is greater than incidence angle.If incidence angle increases, the deflecting light beams that then begins at a certain angle is parallel to the interface and advances.This critical angle also is the angle of total reflection.The angle of total reflection obtains as arcsine (n2/n1).Because according to the design of prefabricated component base portion 3 of the present invention, the smooth most of electromagnetic radiation that is radiated in the base regions is absorbed.
The advantage of the flat design of prefabricated component base portion 3 also is the interaction of prefabricated component base portion 3 and elongate mandrel.During stretch blow-molded, utilize elongate mandrel that prefabricated component 1 is longitudinally extended.Elongate mandrel has relatively little radius of curvature at its free front end, and the radius of curvature of the inwall 17 of prefabricated component base portion 3 is big relatively.Therefore, in drawing process, between prefabricated component base portion 3 and elongate mandrel, only produce very little contact area.Therefore, prefabricated component base portion 3 is cooled to than low degree, and the plastic material of finding therein also can be used for stretch blow-molded process.
The further processed prefabricated member 1 that is designed for stretch blow-molded process of two stages according to the present invention is made up of the plastics that are applicable to stretch blow-molded process; The refractive index of said plastics under 10 ℃～120 ℃ temperature is 1.3 to 1.6, for example polyester, PET (PETG), polyolefin, polystyrene and PLA (PLA) or its mixture.Prefabricated component 1 can comprise one or more layer.It can have filler and/or be used as the additive to the barrier layer of antioxygen, steam or carbon dioxide.
Prefabricated component 1 can have one or more nonferrous layer and/or barrier coat and/or sliding coating and/or the residual coating that abandons.
Because carry through during the heating station to the relatively poor heating of finger-like clamping device, so the neck 4 of prefabricated component 1 also is heated to than low degree.Therefore, can be designed with than have the littler wall thickness of conventional prefabricated component of thick bullet shape base portion at neck.Therefore, can use its neck in threaded portion or similar forward raised areas, to have prefabricated component than the minimum wall thickness (MINI W.) w of the average wall thickness in the prefabricated component body region little at least 20%.

Claims (13)

1. prefabricated component that is used for producing plastic containers at two stages stretch blow molding shaping methods; It has elongated prefabricated component body (2); Vertically hold for one of said prefabricated component body (2) and sealed by prefabricated component base portion (3); Its another vertically end be connected to have the threaded portion (5) or the similar protruding neck (4) of forward; It is characterized in that said prefabricated component (1) is processed by the plastics that are applicable to stretch blow molding shaping method, its refractive index under 10 ℃～120 ℃ temperature is 1.3 to 1.6; And the outer wall (18) and the inwall (17) of said prefabricated component base portion (3) limit smooth divergent lens, and its radius of curvature (c, b) is at least 1.4 times of radius of curvature (R) of inwall (7) of radius of curvature (s) and said prefabricated component (1) of the outer wall (8) of said prefabricated component (1) relevant in said prefabricated component body (2) zone in each case.
2. prefabricated component according to claim 1, the wall ratio transition of the said prefabricated component base portion (3) that wherein is designed to smooth divergent lens in axle (A) zone of said prefabricated component get into the little 0.2mm at least of wall thickness in the zone of said prefabricated component body (2).
3. according to each described prefabricated component in the aforementioned claim; The prefabricated component base portion (3) of wherein said prefabricated component is designed to smooth divergent lens, and the wavelength that makes the axle (A) be basically perpendicular to prefabricated component introduce is that the electromagnetic radiation (R) of 0.5 μ m～2 μ m is through being got into said prefabricated component base portion (3) and/or getting in the said prefabricated component body (2) and by significantly absorption by total reflection.
4. according to each described prefabricated component in the aforementioned claim, wherein said prefabricated component is processed by the plastics or the plastic hybrid that are selected among polyester, PET, polyolefin, polystyrene and the PLA.
5. according to each described prefabricated component in the aforementioned claim, wherein said prefabricated component comprises one or more layer.
6. according to each described prefabricated component in the aforementioned claim, wherein said prefabricated component utilizes injection moulding process production, and injection point is arranged in the zone of the said base portion (3) of said prefabricated component.
7. according to each described prefabricated component in the claim 1～5, wherein said prefabricated component utilizes the extruded in plastic method to produce.
8. according to each described prefabricated component in the claim 1～5, wherein said prefabricated component utilizes the extrusion and blow molding method to produce.
9. according to each described prefabricated component in the aforementioned claim, wherein said prefabricated component comprises a plurality of layers and has at least one nonferrous layer.
10. according to each described prefabricated component in the aforementioned claim, wherein in the base regions of said prefabricated component, the outer wall of said prefabricated component has the roughness bigger than the outer wall of said prefabricated component body.
11. according to each described prefabricated component in the aforementioned claim, wherein in the zone of said threaded portion (5) or similar forward projection, said neck (4) has the minimum wall thickness (MINI W.) (w) than the average wall thickness little at least 20% in the zone of said prefabricated component body (2).
12. according to each described prefabricated component in the aforementioned claim, wherein in the zone of said threaded portion (5) or similar forward projection, particularly on threaded base portion, said neck (4) has the minimum wall thickness (MINI W.) less than 1.34mm.
13. plastic containers, it is by making in two stage stretch blow molding shaping methods according to each described prefabricated component (1) in the claim 1～12.
CN201080058218.2A 2009-12-23 2010-10-02 Preform for producing plastic containers in a two-stage stretch blow-moulding process Active CN102695591B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH01980/09A CH702464A1 (en) 2009-12-23 2009-12-23 Preform for producing plastic containers in a two-stage stretch blow molding process.
CH01980/09 2009-12-23
PCT/EP2010/006021 WO2011076301A1 (en) 2009-12-23 2010-10-02 Preform for producing plastic containers in a two-stage stretch blow-moulding process

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CN102695591A true CN102695591A (en) 2012-09-26
CN102695591B CN102695591B (en) 2015-06-17

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US (1) US8617676B2 (en)
EP (1) EP2516121B1 (en)
CN (1) CN102695591B (en)
BR (1) BR112012013893B8 (en)
CA (1) CA2784644A1 (en)
CH (1) CH702464A1 (en)
ES (1) ES2461965T3 (en)
HR (1) HRP20140490T1 (en)
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BR112012013893B8 (en) 2019-08-13
CA2784644A1 (en) 2011-06-30
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CN102695591B (en) 2015-06-17
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BR112012013893B1 (en) 2019-07-30
CH702464A1 (en) 2011-06-30
UA106407C2 (en) 2014-08-26
EP2516121B1 (en) 2014-04-16
RU2012131428A (en) 2014-01-27
EP2516121A1 (en) 2012-10-31
RU2540301C2 (en) 2015-02-10
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US20120231191A1 (en) 2012-09-13
PL2516121T3 (en) 2014-09-30

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